money1 = 100
money2 = 200
money3 = money1 + money2
print(money3)

moneyType = 'dollar'

# 错误示范 数据类型int和str不能隐式转换
# print(money3 + moneyType)

print(money3,moneyType,sep='')

_class = '体育'
teacher = 'Madson'
# 错误示范 不能数字开头
# 1Student = 'Sun'

# 不能使用关键字
import keyword
print(keyword.kwlist)

# 错误示范 以class命名变量
# class = '体育'